Research On Signalling Affair Synthesis Technology On Load-share Links In The NO.7 Signalling Centralized Supervision System

No.7 signalling protocol carries all information on telecommunication network and is very valuable information resource. So we can say No.7 signalling network is the nervous system of telecommunication network and plays a core part in network. Build of NO.7 signalling centralized supervision system can effectively obtain signalling information, and analyse the macroscopic and microscopic network realtimely and dynamicly, and accomplish assessment and optimization of network performance. Thus, this system provides effective supporting method for management and maintenance of signalling network, and promotes competitive capacity of the enterprise.Due to A&B double flats setting of STP (Signalling Transfer Point) in different place, and working on mode of payload-sharing on signalling links(couple links) between SP (Signalling Point) and STP, the calling signalling sequence cannot be collected completely from single STP. Thus it is difficult to synthesize signalling affair in the signalling supervision system.The first, this thesis illuminateds network architecture of NO.7 signalling network and NO.7 signalling centralized supervision system. The second, the thesis illuminateds several kinds of method of signalling affair synthesis on the base of explaining NO.7 signalling system and CDR/TDR (Call Detail Record / Transaction Detail Record). The last, the thesis researchs and analyses the interaction triggering algorithm, a new method of signalling affair synthesis. The basic train of thought, realization method, critical technical element, concrete operation manner and software program is described at length.In the process of interaction triggering, according to the principle that CIC/OPC/DPC is changelessness in a calling, the key value table of CIC/OPC/DPC is built when IAI/IAM is received. The following MSCs compare the key value in the dynamic table. The signalling affair synthesis enters normal process in case of success in comparing and enters the interaction triggering process in case of unsuccess. The data is synthesized in destination after it is transported through the special channel. Thus, signalling affair synthesis is realized through the method of interaction triggering.The interaction triggering algorithm has considered the cost, efficiency and function synthetically. So signalling affair synthesis not only runs more efficiently, quickly and accurately, but also brings into operation simply and completely. Therefore, thisalgorithm can be applied to all scale of NO.7 signalling centralized supervision system and has the great practical and academic signification.